Radial Engineering PZ-Pre
Acoustic Instrument Preamplifier


The Radial Tonebone PZ-Pre™ is the most powerful acoustic preamplifier ever to be put inside a pedal. And when they say acoustic, Radial does'nt just mean acoustic guitar - they mean ANY acoustic instrument including banjo, violin, cello, mandolin, contrabass, bouzouki or lute. The magic lies in the combination of high performance 100% discrete class-A PZB piezo boosters, an ultra-quiet preamp circuit that will adapt to any pickup system and a host of connectivity options that will put you in total control.

The PZ-Pre is equipped with two inputs for quick instrument changes on stage. These can also be combined to blend two pickups together if you so desire. Features include a powerful yet warm sounding semi-parametric EQ to tailor your sound, feedback eliminating controls including a dual-Q notch filter to surgically remove feedback, a high-pass filter to cut low frequency resonance, and a phase reverse switch to eliminate hot spots on stage. It is also equipped with a host of outputs: a ¼" hi-Z instrument out for an on-stage amp, a pre-EQ balanced XLR output for the PA system and a post EQ XLR out for stage wedges or in-ear monitors. A dedicated tuner out with mute switch lets you quietly tune on-stage. There's even a combination power booster - effects loop to add sizzle and dynamics to the performance and extra presence when soloing.

Radial Engineering PZ-PRE Features:

  • Two channels to switch between instruments
  • Notch & resonance filters eliminate feedback
  • Pre & Post Radial DI outputs for PA and monitors
  • Power booster and mute for more control on stage

Radial Engineering PZ-Pre Specifications:

  • Circuit Type: Proprietary active circuit
  • Standard input impedance: 6.8k Ohm at input jack ('PZB' switch out)
  • Input with PZB switch in Impedance: 10meg Ohm at input jack
  • Output Impendence: 1k Ohm
  • Low cut roll-off:
    • Position 1: 75Hz
    • Position 2: 2:220Hz
  • Notch Freq. range: 56Hz to 330Hz
  • Notch Q:  
    • Setting 1: -8dB
    • Setting 2: -15dB
  • Boost level: 12dB
  • Effects send & receive: -10dB
  • FX loop impedance:
    • Send: 1k Ohm
    • Receive: 15k Ohm
  • Polarity: 180° switch (absolute phase reversal)
  • Connections:
    • Input-1: ¼" unbalanced
    • Input-2: ¼" unbalanced
    • Insert Send/Receive: ¼" unbalanced
    • Amp output: ¼"unbalanced, Hi-Z, 1k Ohm
    • Tuner output: ¼"unbalanced, Hi-Z, 6.8k Ohm
    • Pre-EQ output: XLR balanced mic level 600 Ohms
    • Post-EQ output: XLR balanced mic level 600 Ohms
  • Footswitches:
    • Three: Mute, Boost, Toggle 1-2
    • Heavy-duty high-cycle switches
  • LED indicators:
    • Large 3mm OD ultra-bright LED indicators for: mute, boost, Ch-1 & Ch-2 toggle status
  • Construction: 14 guage steel, baked enamel finish
  • Size: 8"w x 4 ¼"d x 2"h (205 x 110 x 51mm)
  • Weight: 2.7lbs (1.2kg)
  • Warranty: Radial 3-year limited warranty
  • Power Supply: 15VDC 400mA, center pole positive
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